Physics Exam Past Questions and Answers | JAMB, WAEC and NECO

Physics is the science that studies the nature and properties of matter and energy. It covers topics like motion, heat, light, sound, electricity, magnetism, and the structure of atoms.

• Question 1851:

  

  In the diagram above, a 200 W bulb is lighted by a 240 V a.c mains supply. If 1kwh is sold at ₦40, the cost of keeping the bulb lighted for a day is

  Options:
  A) ₦1,920.00
  B) ₦192.00
  C) ₦19.20
  D) ₦1.92
  Show Answer
  The correct answer is B .
• Question 1852: The sign of the change on a charged glass rod may be determined with Options:
  A) a charged electroscope
  B) an uncharged electroscope
  C) a galvanometer
  D) an electrometer
  Show Answer
  The correct answer is A .
• Question 1853: A semiconductor diode is used in rectifying alternating current into direct current mainly because it Options:
  A) allows current to flow in either direction
  B) is non-linear
  C) offers a high input resistance
  D) allows current to flow only in one direction
  Show Answer
  The correct answer is D .
• Question 1854: A 12V battery has an internal resistance of 0.5W.If a cable of 1.0W resistance is connected across the two terminals of the battery, the current drawn from the battery is Options:
  A) 16.0A
  B) 8.0A
  C) 0.8A
  D) 0.4A
  Show Answer
  The correct answer is B .
• Question 1855: Which of the following obeys Ohm's Law? Options:
  A) Glass
  B) Diode
  C) All electrolytes
  D) All metals
  Show Answer
  The correct answer is D .
• Question 1856: If the linear magnification of the objective and eyepiece convex lenses of a compound microscope are 4 and 7 respectively. Calculate the angular magnification of the microscope Options:
  A) 2
  B) 3
  C) 11
  D) 28
  Show Answer
  The correct answer is D .
• Question 1857:

  The time rate of loss of heat by a body is proportional to the

  Options:
  A) temperature of its surroundings
  B) temperature of the body
  C) difference in temperature between the body and its surroundings
  D) ratio of the temperature of the body to that of its surroundings
  Show Answer
  The correct answer is C .
• Question 1858: Which of the following properties make the convex mirror useful as a driving mirror? i. the image is real. ii. the image is erect. iii. it has a wide field of view. iv. the image is magnified. Options:
  A) i, ii, and iv
  B) i, ii, iii
  C) ii and iii
  D) i and iii
  Show Answer
  The correct answer is C .
• Question 1859: A charge of one coulomb liberates 0.0033g of copper in an electrolytic process. How long will it take a current of 2A to librate 1.98g of copper in such a process? Options:
  A) 5 mins
  B) 30 mins
  C) 50 mins
  D) 60 mins
  E) 120 mins
  Show Answer
  The correct answer is A .
• Question 1860: Which of the following are True for $\alpha$-decay. i. mass number, decrease by four. ii. Atomic number decreases by two. iii. mass number does not change. Options:
  A) i and ii only
  B) ii and iii only
  C) i and iii only
  D) i, ii, and iii only
  Show Answer
  The correct answer is A .